Furnace



July 2s, 19.27.l 1,637,159

l. S. PIETERS FURNACE Filed Nov.9, 1925 2 Sheets-Sheet 2 Patented July 26, 1927.

UNITED `STATES 1637;159l PATE-NT 'oF-FICE.

IVON S. PIETERS, OF CHICAGO, ILLINOIS, A-.SSIGNOB T PLIIBBICO JOINTLESS FIBE- BRICK COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FURNACE.

application mea November 9, 1925. serial No. 67,844.

This invention relates to furnaces, more particularly to an improved furnace construction having particular utility under o1l refining stills and the like, and its objects are the provision .of a generally improved furnace construction and settin that will better serve the purpose for whic intended, particularly in connection with stills and the like.

The invention is illustrated in the accompanying drawings, in which Fig. 1. is 'a vertical longitudinal sectional view of an embodiment of the invention, taken onY the line 1-1 of Fig. 2 and showing in elevation the shell or drum of the still illustrated therewith;

Fig. 2 is a transverse vertical section taken on the line 2-2 of Fig. l; and

Fig. 3 is an enlarged front elevational view of the fire door or cover showin the particular burner connections selecte for illustration.

The setting shown in the drawings comprises the longitudinal side walls 5, rear 5 wall 6 and front wall 7. These walls may be formed of common brick blocks which may be -laid up and bonded together in the usual or any suitable manner.

The bases of the walls 5 ma be wider $0 or set in to form horizontal shou ders 8 longitudinally along the interior of each wall 5 adjacent its base portion and the bottom 9 of the furnace may comprise the desired number of courses of common brick blocks laid horizontally across the shoulders 8 and extendinglongitudinally through the furnace from the front wall 7 to the bridge wall 10, The upper ends of each of the walls 6 and 7 may be provided with suitable de- '40 pressions 12 for receiving the opposlte ends of the still, shell or drum 14, suitable packing or yieldable seating material, such as asbestos rope, being pre e 16 to allow for the expansion and contraction which occurs. An underlyingcolumn 17 may be disposed beneath the still 14 at 'the front and substantially centrally between the opposite side walls 6 and 7 The column 17 may be formed of fire brick blocks sultably laid up with a packing or yieldable seating material, such as, for instance, rope again interposed at 18 between the top of the column 17 and the bottom of the still 14. The still connection 19 is shown as passing through the front wall 7 of the setting.

rably employed at The bottom of the furnace chamber 20 has two fire boxes or tunnels 21, 21 one extending longitudinally along each side wall 5 fromthe front wall 7 :to the bridge wall 10. The interior of the furnace is preferably provided with a monolithic refractory lining 23 installed Ain plastic condition, and the tunnels 2l, 21 are also preferably of the same material, thereby a'ording a one-piece jointless lining and tunnel formation within the furnace. The bottom of the furnace chamber 20 may have a course 24 of fire brick laid upon the courses 9 between the tunnels 21, 21 and the interior of the tunnels 21 may similarly have bottom courses 25 of fire brick laid upon the courses 9 through the entire interior of the ltunnels 21. The bridge wall l() is also preferably formed of the same monolithic refractory material. The monolithic lining 23 may be bonded to the walls of the furnace vfitting where def sired-by anchors 28.

The ltunnels or dog houses are in this i11- stancefired by oil burners 30, 30, one 'for each of the tunnels 21. Natural gas or any other suitable or preferred fuel may of course be employed. These burners 30, which may be of any suitable 'or preferred form, may be mounted in the re openings 32, one opening through the lfront wall 7 into each of the tunnels 21. Each burner 30 may include a suitable nozzle 34 disposed to emit the heating flames into the tunnel 21.,

Fuel oil for each burner 30 may be delivered to the same by means of a conduit 35, while a second conduit 36 may deliver steam or air, as desired. Each fire box or tunnel cover or door 38 may be provided with suitable controllable air ports and damper ,means and atomizing and carburetor means may be provided for the burners, as desired.

The tops of the tunnels 21 are flat and have suitable openings`40 which form vents and also provide for regulating the operation of the furnace as well as for securlng unie form operating temperatures. The openings 4() may be covered by ordinary lfire brick blocks 42 laid loosely upon the to tunnel. The openings 40 may be clbsed entirely by the bricks 42, thereby closin olf communication between the interior o the tunnels 21 and the furnace chamber 2O through the tops of the tunnels entirely, or the blocks 42 may be spaced apart or some may be removed to vary the area of the of the openings 40 and obtain the most suitable draft conditions. The stack damper (not sholwn) may, of course, provide further contro The inner wall 45 of each tunnel 21 has a plurality of flame openings 46 opening into the furnace chamber 20 horizontally therethrough so that the flames, instead of iinpingin directly upon the still 14, are directed orizontally or laterally into the furnace chamber 20. In this manner an even distribution of the heat to the bottom of the still is secured and excessive or overheating and undesirable flame impingement upon the bottom of the still are prevented. The bricks 42 for closing and controlling the opening 40 through the tops of the tunnels 21, may be supported on the spaced arch-like tops 48 of the tunnels 21. The directing of the flames from the two tunnels toward each other, also tends to assure more completely burning of any fuel particles cai'- ried into the furnace chamber and this increases the eiliciency. e

From the foregoing, it will now be apparent that the tunnels form fire or combustion chambers along the op osite sides of the interior of the furnace rom the' front wall 7 to the bridge wall 10. In operation, the ames issue from the burners 30 into the tunnels 21. These flames traversing the tunnels 21 issue laterally through the openings 46 and heat the interior of the furnace chamber and the still uniformly and without direct iaine impingement upon the still.

The still 14 may be supported or suspended from overhead supports (not shown) with its ends merely ittin in the front and rear walls 7 and 6. In this way the setting walls may be relieved of the weight of the still.

In the drawings, the vertical breech passage is designated at 60 and the bottom of this passage opens into the rear end of a horizontal tunnel or conduit 62 through which the products of combustion may pass out from the furnace. The front wall 7 is rovided with a suitable air admission opening 63 which may have a controllable door 64 and by connecting the outer end of the conduit 62 with the opening 63 by means of a suitable conduit 65, as shown in dotted lines in Fig. l, the products of combustion passing out throuffh the tunnel 62 may be re-delivered back into the furnace chamber 20. A ire-generative or re-circulatin system for the products of combustion is tus provided. It is to be understood that the products of combustion will be drawn or forced out through the' conduit 62 by suitable fan or impeller means, which may be of the suction or force type, providing a suction or forced draft system as desired.

The tunnel 62 may comprise a double passaged conduit, as shown, laid horizontally beneath the bottom courses 9 and substantially centrally between the side walls 5 with its inner end opening into the passa e 60 and its outer end opening out from the ont. The spaces between the sides of the tunnel or conduit 62 and the walls 5 ma be filled in 1with earth or other suitable filing materia f I do not intend to be limited to the precise details shown or described.

1. In combination, a furnace setting having an internal chamber, a still shell exposed to said chamber, and a pair of fire boxes disposed within said chamber and having side walls provided with openings into the furnace chamber therethrough for directing the fianies from said fire boxes against eac 1 other and into said internal chamber without direct impingement upon the still shell.

2. In combination, a furnace setting having an internal chamber, a still shell exposed to said chamber, and a pair of fire boxes disposed within said chamber and having side walls provided with openings into the furnace chamber therethrough for directin the flames from said fire boxes against eac other and into said internal chamber without direct impingement upon the still shell, said lire boxes having tops provided with openings into the furnace chamber and means for controlling said top openin 3. In combination, a still, an under ying furnace setting, said setting having a furnace chamber, and a pair of fire boxes extending longitudinally along opposite sides of said chamber and havin opening toward each other an into the furnace chamber for directing the flames from said lire boxes against each other and into said internal chamber without direct impingement upon the still shell.

4. In combination, a still, an underlying furnace setting, said setting having a furnace chamber, a air of fire boxes extendin vlongitudinally a ong opposite sides of said chamber and having side outlets opening into the furnace chamber for directing the flames from said fire boxes against each other and into said internal chamber without direct impingement upon the still shell, said fire boxes having tops provided with openings into the furnace chamber and blocks laid upon the tops of said boxes for closing said openings and separable to open same and vary the area of opening.

5. In combination, a furnace settin having front, rear and side walls, a stil supported over said setting, a bridge wall spaced from the rear wail and forming a passage therebetween, a air of fire boxes extending longitudinally a ong opposite sides of the interior of the setting and having side outlets openin into the setting for directing the dames fiom said fire boxes against cach side outlets other and into said internal chamber with out dir-eet iinpingement upon the still shell, and a horizontal tunnel underlying the bot tom of the setting,said tunnel opening at its rear into the bottom of said passage and at its opposite end out through the fronto 6. In combination, a furnace settin having front, rear and side Walls, a stil sl1pported over said setting, a bridge Wall spaced from the rear Walll and forming a passage therebetween, a pai-r of fire boxes extending longitudinally along opposite sides of the interior of the setting and having side outlets opening into the setting for directing the flames from said fire boxes against each other and into said internal chamber Without direct impingement upon the still shell, a horizontal tunnel underl ing the b0t-` tom of the setting, said tnnne opening at its rear into the bottom of said passage and at its opposite end out through the front, the front wall having an inlet opening, and conduit means connectin said tunnel with said inlet opening for re elivering the products Il of combustion into the interior of the setting.

from the portion of the shell exposed inters nally to said chamber to direct the heat and fiames from the fire box into the chamber of the setting `vithout direct impingement upon said shell, means other than the side outlet from said fire box for conveying the products of combustion from said chamber, said fire box having its top disposed Within the'y furnace chamber and provided with openings into said chamber and blocks laid uponl the top of the fire box for closing said openings and separable to open Sameand to vary the amount of opening.

In Witness whereof, I hereunto subscribe my name this 3rd day of November, i925.

IVON S. PIETERS. 

